diff --git a/.github/workflows/_build-rust.yml b/.github/workflows/_build-rust.yml
index 807315ff..f30cc0cc 100644
--- a/.github/workflows/_build-rust.yml
+++ b/.github/workflows/_build-rust.yml
@@ -58,9 +58,9 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          # We do not have a Cargo.lock here, so I hash Cargo.toml
-          key: ${{ runner.os }}-rust-${{ inputs.rust-version }}-cargo-${{ hashFiles('**/Cargo.toml') }}
-          restore-keys: ${{ runner.os }}-cargo-${{ inputs.rust-version }}
+          # Hash over Cargo.toml and Cargo.lock, as this might be copied to
+          # projects that do not have a Cargo.lock in their repository tree!
+          key: ${{ runner.os }}-rust-${{ inputs.rust-version }}-cargo-${{ hashFiles('**/Cargo.toml', '**/Cargo.lock') }}
       - run: cargo version
       - name: Build (library)
         run: cargo build --target ${{ inputs.rust-target }} --features ${{ inputs.features }}
diff --git a/.gitignore b/.gitignore
index d4f917d3..c6262ea6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 target
-Cargo.lock
 *.swp
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 00000000..fb9c7456
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,95 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "derive_more"
+version = "0.99.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "multiboot2"
+version = "0.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d408e10189a4b0e1d488a24a19c5c8c9786f011b30c824c8ab02d3ebf5f62ca2"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "multiboot2"
+version = "0.15.1"
+dependencies = [
+ "bitflags",
+ "derive_more",
+ "log",
+]
+
+[[package]]
+name = "multiboot2-header"
+version = "0.2.0"
+dependencies = [
+ "multiboot2 0.13.3",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba466839c78239c09faf015484e5cc04860f88242cff4d03eb038f04b4699b73"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"